Modifying the molecular weight of chitosan

Tsai, Min-Lang; Chen, R.H.

doi:10.1016/b978-0-08-100230-8.00006-6

Cited by 8 publications

(7 citation statements)

References 85 publications

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“…The disparity in structural functionality due to varying the molecular weight distribution of chitosan has been highlighted in literature ( Tsai and Chen, 2017 ). Addition of the high viscosity counterpart immobilises water efficiently to delay starch gelatinisation and forms enhanced associations with whey protein at pH around its pKa value.…”

Section: Resultsmentioning

confidence: 99%

In-vitro starch hydrolysis of chitosan incorporating whey protein and wheat starch composite gels

Yang

Ashton

Gorczyca

et al. 2017

Heliyon

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The study examined the influence of chitosan, incorporated into whey protein and wheat starch thermo gels, on the in-vitro hydrolysis of the polysaccharide. Gels were subjected to the following external conditions containing α-amylase at constant incubation temperature of 37 °C: In the first procedure, they were immersed in phosphate buffer (0.05 M) and maintained at pH 6.9 throughout the entire digestion. In the second instance, they were introduced into a salt solution, with pH and total volume adjusted at times in sync with the human gastrointestinal tract. Results indicate that low and medium molecular weight chitosan, in combination with whey protein, were effective at enhancing the protective barrier against starch degradation. Less maltose was liberated from gels containing medium molecular weight chitosan, as opposed to the low molecular weight counterpart, and results compare favorably with the outcome of the in-vitro digestion of binary whey protein and wheat starch composites.

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Section: Resultsmentioning

confidence: 99%

In-vitro starch hydrolysis of chitosan incorporating whey protein and wheat starch composite gels

Yang

Ashton

Gorczyca

et al. 2017

Heliyon

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“…The molecular weight (MW) of chitosan is a characteristic associated with the number of monomeric units per polymer molecule (n). The deacetylation process brings about a change in MW and depending on the source and preparation procedure, the average MW of chitosan may range from 50 to 2000 kDa [ 99 ]. The MW of chitosan can be measured by light scattering, high-performance liquid chromatography (HPLC) and viscosimetric methods [ 23 ].…”

Section: Chitosanmentioning

confidence: 99%

“…The MW of chitosan can be measured by light scattering, high-performance liquid chromatography (HPLC) and viscosimetric methods [ 23 ]. Chitosan can be classified as low molecular weight (LMW), medium molecular weight (MMW) and high molecular weight (HMW) [ 99 ]. Generally, the MW of chitosan can be modified by using depolymerisation techniques where the high MW chitosan is converted to a lower MW.…”

Section: Chitosanmentioning

confidence: 99%

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Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

et al. 2021

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The quality of water is continuously under threat as increasing concentrations of pollutants escape into the aquatic environment. However, these issues can be alleviated by adsorbing pollutants onto adsorbents. Chitosan and its composites are attracting considerable interest as environmentally acceptable adsorbents and have the potential to remove many of these contaminants. In this review the development of chitosan-based adsorbents is described and discussed. Following a short introduction to the extraction of chitin from seafood wastes, followed by its conversion to chitosan, the properties of chitosan are described. Then, the emerging chitosan/carbon-based materials, including magnetic chitosan and chitosan combined with graphene oxide, carbon nanotubes, biochar, and activated carbon and also chitosan-silica composites are introduced. The applications of these materials in the removal of various heavy metal ions, including Cr(VI), Pb(II), Cd(II), Cu(II), and different cationic and anionic dyes, phenol and other organic molecules, such as antibiotics, are reviewed, compared and discussed. Adsorption isotherms and adsorption kinetics are then highlighted and followed by details on the mechanisms of adsorption and the role of the chitosan and the carbon or silica supports. Based on the reviewed papers, it is clear, that while some challenges remain, chitosan-based materials are emerging as promising adsorbents.

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“…In the milling process, cutting elements of the rotor result in repeated fracturing, which can induce chain disorder and phase transformation, in addition to the primary aim to decrease particle size. A combination of shearing and fracture during the milling process can lead to chain scission and reduction in the molecular weight of plastics ( Zhang, 2004 ; Tsai and Chen, 2017 ). The size and the properties of the milled particles depend on the type of the blades, rotation velocity, size of the input material, and process temperature.…”

Section: Mechano-thermo-photo Irradiative and Green Chemical (Pre)treatment Of Plasticsmentioning

confidence: 99%

Progressing Plastics Circularity: A Review of Mechano-Biocatalytic Approaches for Waste Plastic (Re)valorization

Nikolaivits

Pantelic

Azeem

et al. 2021

Front. Bioeng. Biotechnol.

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Modifying the molecular weight of chitosan

Cited by 8 publications

References 85 publications

In-vitro starch hydrolysis of chitosan incorporating whey protein and wheat starch composite gels

In-vitro starch hydrolysis of chitosan incorporating whey protein and wheat starch composite gels

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

Progressing Plastics Circularity: A Review of Mechano-Biocatalytic Approaches for Waste Plastic (Re)valorization

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